﻿#region License, Terms and Conditions
//
// Jayrock - A JSON-RPC implementation for the Microsoft .NET Framework
// Written by Atif Aziz (www.raboof.com)
// Copyright (c) Atif Aziz. All rights reserved.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License as published by the Free
// Software Foundation; either version 3 of the License, or (at your option)
// any later version.
//
// This library is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
// details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this library; if not, write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
//
#endregion

#if !NET_1_0 && !NET_1_1

namespace Jayrock.GeoJson
{
    #region Imports

    using System;
    using Jayrock.Json;
    using Jayrock.Json.Conversion;
    using Jayrock.Json.Conversion.Converters;

    #endregion

    public class GeoJsonPositionImporter : ImporterBase
    {
        public GeoJsonPositionImporter() :
            base(typeof(GeoJsonPosition)) { }

        protected override object ImportFromArray(ImportContext context, JsonReader reader)
        {
            if (context == null) throw new ArgumentNullException("context");
            if (reader == null) throw new ArgumentNullException("reader");

            reader.Read();

            object x = context.Import(typeof(double), reader);
            if (x == null)
                throw new JsonException("X value cannot be null for a GeoJSON position.");

            object y = context.Import(typeof(double), reader);
            if (y == null)
                throw new JsonException("Y value cannot be null for a GeoJSON position.");

            object z = null;
            if (reader.TokenClass != JsonTokenClass.EndArray)
                z = context.Import(typeof(double), reader);

            reader.ReadToken(JsonTokenClass.EndArray);

            return z == null
                 ? new GeoJsonPosition((double) x, (double) y)
                 : new GeoJsonPosition((double) x, (double) y, (double) z);
        }
    }
}

#endif // !NET_1_0 && !NET_1_1
